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Abstract

The invention relates to an additive and to a method of corrosion inhibition on devices for the recovery and transportation of hydrocarbons in crude oil recovery and processing by adding an effective amount of an inhibitor. The inhibitor comprises an alkoxylated quaternary compounds of the formula 1 ##STR00001## where R.sup.1, R.sup.2 are independently groups of the formula --(B)--(O--A).sub.n--O--CO--R.sup.5 or --(A--O).sub.n--(C)--CO--O--R.sup.5, R.sup.3 is C.sub.1-- to C.sub.30-alkyl or C.sub.2-- to C.sub.30-alkenyl, R.sup.4 is an organic radical with 1 to 100 carbon atoms optionally containing heteroatoms, R.sup.5 is an alkyl or an alkenyl, n is a number from 1 to 20, A is an alkylene group, B is an alkylene group, C is a C.sub.1-- to C.sub.6-alkylene group and X is an anion, used as corrosion inhibitors.

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First Claim